View clinical trials related to Cochlear Prosthesis Implantation.
Filter by:The construction of our auditory space requires several prerequisites, including localization abilities in 3D (azimuth, elevation and distance). These abilities rely on the proper development and functionality of the auditory system to extract various acoustic cues from our environment. Extraction and analysis of these auditory cues are based on the synchronous use of ears, called binaurality. Other natural behaviours are useful to precisely determine the location of a sound source: visual information and head movements. The slightest anatomical-functional change (e.g. unilateral hearing loss, malformation of the pinna) can disturb spatial hearing abilities. Many patients with hearing loss are fitted with a hearing aid (HA) or a cochlear implant (CI) to ensure the best speech understanding. However, this auditory rehabilitation remains insufficient to restore a good perception of spatial hearing. One of the key point to improve sound localization seems to be microphone positioning on hearing aids. Several questions remain on the optimal microphone positioning.
Electrocochleography (eCochG) is an electrophysiological measurement to evaluate the activity of cochlear hair cells in response to acoustic stimulation. This measure thus reflects the functional state of the cochlea and more specifically the neuronal survival. Whereas in the normal-hearing subject, eCochG collection requires the introduction of a collection electrode in the middle ear, closest to the cochlea, in the cochlear implant subject, eCochG can be collected through the electrodes of the cochlear implant. Measured during surgery, eCochGs may help optimize the placement of the electrode array within the cochlea and help in the decision to refer the patient to a conventional cochlear implant or, when residual cochlear activity is detected, to an electro-acoustic implant system. The main objective of this study is to evaluate the usefulness of intra-operative eCochG collections for the optimization of electrode array placement within the cochlea and then for monitoring the residual hearing and its relationship to hearing performance during the first months of rehabilitation.
A new Neuro-Immersion system based on virtual reality and 3D motion tracking has been developed recently, allowing to evaluate and record the spatial localization performance of cochlear implant (CI) users. This system allows to highlight localization deficits in three-dimensional space for all CI patients. Unfortunately, there is currently no suitable postoperative management for these localization problems. However, the discomfort felt by patients is clearly verbalized. Thanks to the new virtual reality system, it is now possible to develop a rehabilitation protocol adapted to each patient. This project will focus on the evaluation of a spatial auditory rehabilitation, based on unisensory (visual) or multisensory (auditory and visual) feedback, for bilateral CI adults.